Communication Protocols

Serial

a serial port is a serial communication physical interface through which information transfers in or out one bit at a time. Data transfer through serial ports connected the computer to devices such as terminals and various peripherals. More information can be found in the Wiki or at this page

Tools:

Free Serial port monitor
Free Serial Port Monitor allows you to intercept, display and analyze all data exchanged between the Windows application and the serial device. It can be successfully used in application development, device driver or serial hardware development and offers the powerful platform for effective coding, testing and optimization.